Re^3: How to reverse a huge file in Perl?

If the file he used doesn't contain any newlines, all it does is a straight copy.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

Comment on Re^3: How to reverse a huge file in Perl?

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Re^4: How to reverse a huge file in Perl? by samtregar (Abbot) on Mar 26, 2008 at 20:00 UTC
Didn't he already show you a `wc -l`? Did you test it yourself and get different results? -sam	[reply] [d/l]
Re^5: How to reverse a huge file in Perl? by BrowserUk (Patriarch) on Mar 26, 2008 at 20:56 UTC
Didn't he already show you a wc -l? Did you test it yourself and get different results? No. He only added the `wc` after I asked how many lines were in the file. And I asked because the only way I could reproduce anything like his results was if I ran `tac` on a large file that contained few or no newlines. It is faster, but not by the margins his test showed. Then again, I'm using a win32 native port of tac and I do not know how close it is to the *nix version, or if it uses the same algorithm. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply] [d/l] [select]
Re^4: How to reverse a huge file in Perl? by Anonymous Monk on Mar 26, 2008 at 18:48 UTC
If the file he used doesn't contain any newlines Obviously, the file does contain 323833 newlines.	[reply]
Re^5: How to reverse a huge file in Perl? by BrowserUk (Patriarch) on Mar 26, 2008 at 19:39 UTC
Ah. I hadn't seen the updates. Having asked the question, I kind of expected the answer to come in the form of a reply to it, but none came. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice. "Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."	[reply]